下面的示例显示了控制Checkbox一系列可能状态的颜色。Material-
UI不会管理的focused状态Checkbox，而仅管理一个状态focusVisible，因此Checkbox通过键盘将焦点移至会触发该状态。focused在下面的示例中，我通过focused使用的onFocus和onBlur属性显式管理状态来显示样式Checkbox。

import React from "react";
import ReactDOM from "react-dom";

import { createMuiTheme, ThemeProvider } from "@material-ui/core/styles";
import Checkbox from "@material-ui/core/Checkbox";

const theme = createMuiTheme({
  overrides: {
    MuiCheckbox: {
      colorSecondary: {
        color: "green",
        "&:hover": {
          color: "blue"
        },
        "&$checked": {
          color: "purple",
          "&:hover": {
            color: "lightblue"
          },
          "&.Mui-focusVisible": {
            color: "red"
          }
        },
        "&.Mui-focusVisible": {
          color: "orange"
        },
        "&.focused:not(.Mui-focusVisible):not($checked)": {
          color: "pink"
        }
      }
    }
  }
});
function App() {
  const [focused, setFocused] = React.useState(false);
  return (
    <ThemeProvider theme={theme}>
      <div className="App">
        <Checkbox
          className={focused ? "focused" : ""}
          onFocus={() => setFocused(true)}
          onBlur={() => setFocused(false)}
        />
        <input value="somewhere to move focus" />
      </div>
    </ThemeProvider>
  );
}

const rootElement = document.getElementById("root");
ReactDOM.render(<App />, rootElement);